[LLVMdev] TargetDescription string
Preston Briggs
preston.briggs at gmail.com
Fri Oct 26 17:11:09 PDT 2012
In "Writing an LLVM Compiler Backend", there's some discussion of the
TargetDescription string, but it doesn't explain the examples I look
at. For instance, in the description of the PowerPC, I see
"E-p:64:64-f64:64:64-i64:64:64-f128:64:128-n32:64"
What's "preferred alignment" versus "ABI alignment"?
What are the 3 figures following the "i"? (the documentation suggests
there will only be 2).
I see two entries for "f". Do I read these as info about "f64" and "f128"?
What is "n32:64" about?
Thanks,
Preston
More information about the llvm-dev
mailing list